Google Cloud Build show no logs - google-cloud-platform

Question

I have a Google Cloud Trigger that triggers cloud build on Github push.
The problem is that the Cloud Build shows no logs. I followed this doc but can not find any logs on neither the Cloud Build log nor the Logs Explorer (see the image below)
This is my cloudbuild.yaml
steps:
# install dependencies
- name: node:16
entrypoint: yarn
args: []
# create .env file
- name: 'ubuntu'
args: ['bash', './makeEnv.sh']
env:
- 'GCP_SHOPIFY_STOREFRONT_ACCESS_TOKEN=$_GCP_SHOPIFY_STOREFRONT_ACCESS_TOKEN'
- 'GCP_SHOPIFY_DOMAIN=$_GCP_SHOPIFY_DOMAIN'
# build code
- name: node:16
entrypoint: yarn
args: ["build"]
# deploy to gcp
- name: 'gcr.io/google.com/cloudsdktool/cloud-sdk'
entrypoint: 'bash'
args: ['-c', 'gcloud config set app/cloud_build_timeout 1600 && gcloud app deploy --promote']
timeout: "1600s"
options:
logging: CLOUD_LOGGING_ONLY
The build failed but it actually create a subsequence App Engine build that successfully deploy a version to App Engine. But that version is not auto-promoted (see the image below)

Answer 1

I do not have all the details, so trying to help with all the above information mentioned.
As I can see you are using CLOUD_LOGGING_ONLY and not been able to see the log in the log explorer and considering you have all the permissions to access the logs.
I would suggest you to look into the service account that you are using for cloud build must at least have the role:
role/logging.logWriter or permission:logging.logEntries.create permission if it is not the default cloud build SA project-number#cloudbuild.gserviceaccount.com.
Hope this helps :)

Answer 2

In my case, looking at the Google Cloud Build Service Account (project-number#cloudbuild.gserviceaccount.com) in the Google Cloud IAM console, it was missing the role Cloud Build Service Account. I was also missing logs.
This fixed symptom of a cloud function deploy with the message:
(gcloud.functions.deploy) OperationError: code=3, message=Build failed: {
"metrics":{},
"error":{
"buildpackId":"",
"buildpackVersion":"",
"errorType":"OK",
"canonicalCode":"OK",
"errorId":"",
"errorMessage":""
}
}